[lolgti]

I would not recommend 4 Prong spark plugs for use in a Smallport 4AGE. They work for like 60 k's then make the car run like a dog.

Get a good set of single prongs.

That is all.

[Casey-G]

gay as i was gonna buy these, iridium plugs it is than...

[Enki]

The best plugs iv used have so far been the proper toyota (denso) iridium ones.
Cheap and last about 80,000km.
Haven't had a single problem with them yet boosted or NA.

Nick

[trdee]

just use normal standard cheap plugs and change them regularly

[Twincam16]

Also 1st?

[lolgti]

1st thread.

It's a thing aimed at Boosters.

[rthy]

im running these now in my 4age, only cos the std ngk plugs are farked
can't really tell the difference
might be usefull if running after market igition with bigger spark???
like one of those ecoil's


edit:

This post has been edited by rthy: 12 June 2009 - 05:39 PM

[Casey-G]

rthy, on Jun 12 2009, 05:34 PM, said:

im running these now in my 4age, only cos the std ngk plugs are farked
can't really tell the difference
might be usefull if running after market igition with bigger spark???
like one of those ecoil's


edit:

I really see no advantage in this design, apart from maybe the "open face" making the spark open towards the rest of the cylinder (if it helps in some way).

With the research on electronics my class and I did in physics last year it only makes sense that the spark will only jump to one of the 4 prongs (path with least resistance/easiest route) as in there would be no way that the spark could jump to all 4 electrodes at any one time per cycle although these plugs would possibly take longer to become "worn out", but my money is on the plugs with a high inductive core and the really fine electrode being better for performance (iridium??) :S ... Just my 2 cents.

This post has been edited by Casey-G: 13 June 2009 - 04:47 AM

[mats12]

They're great for 2 stroke engines, like lawn movers, whipper snippers, etc. Stuff that you dont use much, coz with 4 tips they take a while to gunk up and missfire.

[Trev084]

rthy, on Jun 12 2009, 05:34 PM, said:

im running these now in my 4age, only cos the std ngk plugs are farked
can't really tell the difference
might be usefull if running after market igition with bigger spark???
like one of those ecoil's

The aftermarket coil will have a better voltage output which will keep up with the plugs resistance.

[Pimpinrolla]

from wat i hear the 4 ground electrodes are better because the spark has 4 prongs to jump to.
which means if 1 electrode fauls up there are 3 more. the spark will always choose the ignition path with least resistance.
i've got them in my smallport they've been good, haven't had any troubels.
although they've probably only been in there for just over 20 tho ks

[hb_torana]

Four prong, two prong all bad bad bad, proven bad.

The simplest explanation I can provide the four prongs enclose and seperate the ball of ignited mixture..
The additional arms prevent the envelope/fireball/explosion from expanding cleanly.

Take some string, tie loosely around an uninflated balloon. start blowing up the balloon.
The ballon can only expand to the string and starts to expand around the string.
You will then see the balloon continues to expand around the string in multilpe areas.

This seperation happens to the ball of ignited gas (flame front).
Basically end up with multiple flame fronts at differnet rates and/or odd shaped expansion, instead of a pretty, expanding sphere.

The simple standard J plugs are one the best designed plugs out there.
That is why even ford/toyota/motorcyles, jetskis and every other spark ignition engine use that same plug design as your toyota.

The toyota/bosch plug iridium/platinum with the tiny centre pin and J are the best you will get, unless you go to an open face plug ie no j piece.

The open face plug will generally only ever found for in use in boats or generators.
They are only used where engine rpm is static, they have an increased tendancy to foul up.

So take the 4 prong plugs and throw them to the shitter.

[hojak]

trdee, on Jun 9 2009, 11:20 PM, said:

just use normal standard cheap plugs and change them regularly

Agreed. Coppers ftw.
4 Prongs, what a laugh.

[Casey-G]

hojak, on Jan 6 2010, 12:05 AM, said:

Agreed. Coppers ftw.
4 Prongs, what a laugh.

threaddig


& silver cored plugs would be ftw

[hojak]

Casey-G, on Jan 5 2010, 11:26 PM, said:

threaddig


& silver cored plugs would be ftw

haha yeah, easy when the thread is still on the first page.

This post has been edited by hojak: 10 January 2010 - 12:20 AM

[Casey-G]

Hard when you check the last post date...